First, let's cover the basics. A standard lasagne recipe typically takes around 30-40 minutes to cook in a preheated oven at 180°C (350°F). But, if you're using a convection oven, you can expect it to be done a bit faster, in around 20-30 minutes.
Now, I know what you're thinking, "What about the cheese, will it be all melty and gooey"? And to that, I say, absolutely! A good lasagne needs a generous amount of cheese, and the oven heat will make it all melted and delicious.